content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2013, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * ------------------------
   * GrayPaintScaleTests.java
   * ------------------------
   * (C) Copyright 2006-2013, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 05-Jul-2006 : Version 1 (DG);
   * 26-Sep-2007 : Added testConstructor() and testGetPaint() (DG);
   * 29-Jan-2009 : Extended testEquals() for new alpha field (DG);
   *
   */
  
  package org.jfree.chart.renderer;
  
  import org.junit.jupiter.api.Test;
  
  import java.awt.Color;
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectInput;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutput;
  import java.io.ObjectOutputStream;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertNotSame;
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  
  /**
   * Tests for the {@link GrayPaintScale} class.
   */
  public class GrayPaintScaleTest  {
  
      private static final double EPSILON = 0.000000001;
  
      /**
       * Simple check for the default constructor.
       */
      @Test
      public void testConstructor() {
          GrayPaintScale gps = new GrayPaintScale();
          assertEquals(0.0, gps.getLowerBound(), EPSILON);
          assertEquals(1.0, gps.getUpperBound(), EPSILON);
          assertEquals(255, gps.getAlpha());
      }
  
      /**
       * Some checks for the getPaint() method.
       */
      @Test
      public void testGetPaint() {
          GrayPaintScale gps = new GrayPaintScale();
          Color c = (Color) gps.getPaint(0.0);
          assertEquals(c, Color.BLACK);
          c = (Color) gps.getPaint(1.0);
          assertEquals(c, Color.WHITE);
  
          // check lookup values that are outside the bounds - see bug report
          // 1767315
          c = (Color) gps.getPaint(-0.5);
          assertEquals(c, Color.BLACK);
          c = (Color) gps.getPaint(1.5);
          assertEquals(c, Color.WHITE);
  
          // add a check for Double.NAN
          c = (Color) gps.getPaint(Double.NaN);
          assertEquals(c, Color.BLACK);
  
          c = (Color) gps.getPaint(Double.POSITIVE_INFINITY);
          assertEquals(c, Color.WHITE);
  
          c = (Color) gps.getPaint(Double.NEGATIVE_INFINITY);
          assertEquals(c, Color.BLACK);
      }
  
      /**
       * A test for the equals() method.
       */
      @Test
      public void testEquals() {
          GrayPaintScale g1 = new GrayPaintScale();
          GrayPaintScale g2 = new GrayPaintScale();
          assertEquals(g1, g2);
          assertEquals(g2, g1);
  
          g1 = new GrayPaintScale(0.0, 1.0);
          g2 = new GrayPaintScale(0.0, 1.0);
          assertEquals(g1, g2);
          g1 = new GrayPaintScale(0.1, 1.0);
          assertFalse(g1.equals(g2));
          g2 = new GrayPaintScale(0.1, 1.0);
          assertEquals(g1, g2);
  
          g1 = new GrayPaintScale(0.1, 0.9);
          assertFalse(g1.equals(g2));
          g2 = new GrayPaintScale(0.1, 0.9);
          assertEquals(g1, g2);
  
          g1 = new GrayPaintScale(0.1, 0.9, 128);
          assertFalse(g1.equals(g2));
          g2 = new GrayPaintScale(0.1, 0.9, 128);
          assertEquals(g1, g2);
      }
  
      /**
       * Confirm that cloning works.
       */
      @Test
      public void testCloning() throws CloneNotSupportedException {
          GrayPaintScale g1 = new GrayPaintScale();
          GrayPaintScale g2 = (GrayPaintScale) g1.clone();
          assertNotSame(g1, g2);
          assertSame(g1.getClass(), g2.getClass());
          assertEquals(g1, g2);
      }
  
      /**
       * Serialize an instance, restore it, and check for equality.
       */
      @Test
      public void testSerialization() throws IOException, ClassNotFoundException {
          GrayPaintScale g1 = new GrayPaintScale();
  
          ByteArrayOutputStream buffer = new ByteArrayOutputStream();
          ObjectOutput out = new ObjectOutputStream(buffer);
          out.writeObject(g1);
          out.close();
  
          ObjectInput in = new ObjectInputStream(
                      new ByteArrayInputStream(buffer.toByteArray()));
          GrayPaintScale g2 = (GrayPaintScale) in.readObject();
          in.close();
  
          assertEquals(g1, g2);
      }
  
  }
  